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Just talking about USDM models, for the STi they use one of each for the crank or the cam sensor I'm just not sure which one is a reluctor type and the other is a hall effect. On the WRX they are both reluctor type. The trigger for the actual cam position on the end of the cam itself is also different between USDM and JDM cams so unless you have an aftermarket ECU or JDM ECU you will run into trouble making the JDM cams work with AVCS

well i dont understant why sti need 3 pins, they just read negative, as where jdm read positive

Reluctor sensors usually require 3 wires, hall effect only need two. The positive or negative triggering are when the ecu counts the pulse on the rising edge or falling edge of the signal. It has nothing to do with the wiring of it.

Just talking about USDM models, for the STi they use one of each for the crank or the cam sensor I'm just not sure which one is a reluctor type and the other is a hall effect. On the WRX they are both reluctor type.

The USDM uses hall effect for CAM trigger sensors. It is still magnetic for the crank, like all EJ motors. The EJ207 AVCS uses a magnetic (sin wave) for AVCS sensor type. The trigger on the cams are also different, see below.

Quote:

The trigger for the actual cam position on the end of the cam itself is also different between USDM and JDM cams so unless you have an aftermarket ECU or JDM ECU you will run into trouble making the JDM cams work with AVCS

Are you talking the diffence in trigger location or simply the well known positive/negative trigger... JDM is a raised bump and USDM uses the machined grove.

Again, the point is to use USDM heads, JDM cams, JDM triggers and of course JDM ECU. Why would anyone with USDM AVCS bother trying to add JDM AVCS? Maybe some misguided venture to run big port heads while retaining AVCS...which D25 heads can be ported as large and have avcs and don't need combustion chamber work. The only reason to port big port heads would be MAX power and th eassociated cams would make AVCS worthless.

My biggest concern at this point is actual cam trigger timing in relation to crank angle and then fitment differences for the sensors into the head. I need to get some hands on. Trying to pick up a locals EJ207 heads...

EVERYONE, PM b7g and tell him to sell me the heads so I can get this figured out

do you have a set of JDM cams to see how the trigger lines up with the hole or a way to compare angular mounting of the sensor in relation to the cam? Degrees from the valve cover mating surface would probably be easiest to reference.

do you have a set of JDM cams to see how the trigger lines up with the hole or a way to compare angular mounting of the sensor in relation to the cam? Degrees from the valve cover mating surface would probably be easiest to reference.

I have the cams but they are at the shop being put together with the heads and his heads are on his csr

ok, back to plan A.) Everyone PM b7g and have him sell me just his heads

Well ok If I can find a 2.5 head, which he may have I will set them in there, and get pictures, but I'm not going to bolt it down or put on the valve covers,

Hey jdmspecc or whatever's their vendor name is.could get me two empty heads for like 750 shipped, big ports. Also you can buy new castings for like 500 a piece from jdmparts or whatever the site is. Hey pm me your number And I will just email the pictures when I get them, or your email, my photobuckets hates me I have to many pictures, also I forgot to save it the other day

I'll shoot it to you again. I may have a line on some trashed spec c heads...it'll at least get me the values I need short of the JDM cam trigger timing. I'll be slapping a block, heads and cam degree wheel on to sort this out.

I'm in the middle of a camshaft debate for my motor. I have built Ver8 big ports with JUN 272s but I'm rewiring and switching over to an AVCS setup and my Juns are non-avcs. i was thinking going with the GSC S1, will be great for daily driving but still has almost the same lift as the S2 272s and even the durations are not much different except for the S1s being set at 0.04" vs 0.05" on S2. I was the crazy top end but I also don't want to have ****y idle and lose any low end which is the bueaty of the S1 268s. Also I'm in the market to sell my Jun 272s. Any interest PM peoples!

I hate the fact that they change the lift for the duration. Wonder if it's a marketing angle, hoping people are dumb and don't notice the change? Or if they wanted to base it at 1mm but then why do the others are .050"

The hall effect cam pickups coincided with the first implementation of throttle by wire, which was with the USDM Sti.

Since then, we have now the JDM Spec C that is dual avcs, throttle by wire.
Maybe they have hall effect sensors.
I am not sure if dual AVCS cams fit in single AVCS cars. If they do, the way to go may be with V10 EJ207 cams.

I can look up the part numbers for that engine's cam sensors and compare with USDM dual AVCS. If they are the same, you could sense those cams, if they physically fit.

The hall effect cam pickups coincided with the first implementation of throttle by wire, which was with the USDM Sti.

Since then, we have now the JDM Spec C that is dual avcs, throttle by wire.
Maybe they have hall effect sensors.
I am not sure if dual AVCS cams fit in single AVCS cars. If they do, the way to go may be with V10 EJ207 cams.

I can look up the part numbers for that engine's cam sensors and compare with USDM dual AVCS. If they are the same, you could sense those cams, if they physically fit.

Of course, you would have to locate someone that sells them first..

They ver 10 jdm is sti using a 16bit ecu with dual avcs???? Tell me where I Can get the ecu and the heads, I'm all game for dual avcs